Stay bolt for boilers



' Maid, 20,1928. 1,663,336

'E. I. DQDDS \STAY BOLT FOR BOILERS -Filed Sept; 24 1925 Y 2Sheets-Sheet 2 1" jjitiiiitj:

Patented Maro 20, 1 928.

UNITED STATES PATENT oFFIc-E,

ETI IAN I. DODDS, OF CENTRAL VALLEY, NEW YORK, ASSIGNOR,'BY MESNE ASSIGNMENTS, TO FLANNERY BOLT COMPANY, A CORPORATION OF DELAWARE (1926).

STAY BOLT FOR BOILERS.

Application filed September 2, 1925. Serial No. 58,373.

This invention relates to improvements in staybolts for boilers,oneobject of the invention being to soconstruct avstayboltas to facilitatethe testing of the same.

6 A further object isto provide a staybolt with a plurality of tell-taleholes or passages which tshallwbe soconnected near one end of theboltthat a testing medium may be passed through one ofsaid holes or passagesfrom oneyendofthe bolt and caused to return through the other hole orpassage to the starting end of the bolt, whereby the presence ofsediment in either of said holes or passages maybe detected.

l/Viththese and other objects in view,.the invention consists in certainnovel features of construction and combinations of parts as hereinafterset .torth and pointed out in the claims.

- in the accompanying drawings,

Figuresl ,and 2 are views representing blanks. v

,Figure 3 is a view partly in section show ingi one application ofmyinvention.

Figured is a diagrammatic View illustrativezof means employed whenfluidisused as a testing imedium- Figures 5 to 20 inclusive areviewsshowing variousother forms of construction.

30 ll hebolt maybe ,formed from a suitable bar of metal 1 provided witha plurality of passages or telletale holes. The blank may be made,interiorly with a single bore 2 which may have inserted therein, ,a

partitionsuch asshownat3, Figure 17, or

in the form shown at l, Figure 18,:thus forming two longitudinallyextending. holes or passages 5-5. The :blank and therefore the vboil-tmay have boresyor passages located close together, or the longitudmalholes or passages maybe separated anappreciable distance from eachother, as shownatf), Figures 1,2 and ,3.

Thebolt ,7, Figure 3,-may be formed ,from the blankshown; in Figures 1andi2, and may be of the rigid staybolt type jhavingexte- .riorlythreadedportionsS and 9 to thread through holes in sthe boiler ,sheetslOand 11 and may be upset or fiangedat ts ends. -'1? he;bores or passagesin the bolt extend from one end o'f'the latter approximately to theother end thereof, or both ends of said bores or passages may terminate,short dis tances from respective ends of the bolt, as

shown in Figure 20. In the form of inven-' tion shown inFigure 3, thebores or passages 6 extend from one end of the bolt and terminateattheir other ends inwardlyof the opposite endof'the bolt and at thelatter end of the bolt, a larger bore 12 is formed. In thisbore 12, aplug 13is insertedandmay beheld securely therein by a weld l4. Tlieinner end of this plug is provided with ,a curved groove 15 whichconnects the two bores or passages 6, and the curvedwall .15 of saidgroove serves to .deflect a testing medium and cause the same readilyto-pass from one bore or passage to the .other. In Figure 8, the plug 13is located entirely within the bore 12 but if desired the plug,

maybe causedtoentirely fill said rbore l2and its innerend may be made toabut against a shoulderassho-wninFig. 7.

Thetesting medium employed nay,be;air,

water or a flexible device. In FiguresBand 4, I have illustrated ,meanswherebyafluid, such as air or water, may beused. These means maycomprise nipples l920 to ",be applied to the openends of the boresorpassages. The nipple 19 may connected by a pipe 21 with asourceoffluid supplypsuc h as a tank or a pump illustrated diagrammatically at2 2,e a gage 23 and a valve 124 being interposedin the pipe connection21 The nipple 20 mayihavepconnected therewith, a pipe 25 havinginterposed therein a gage 26 and a valve 27. NVith sucharrangement,.fluid may belca used to pass through oneof the passages .6 and returnthrough the other passage 6 in thejbolt, finally escaping throughthepip'e25 and any desired pressure may be maintained by manipulation ofthe valves24 27, the pressure being indicated on the gages ;2326.'

Instead of using ,fluid as a testing rnedium, Inlay employ-a flexible.wire28'prefferably havinga small knob or enlargement apparent that whenthe flexible device or wire 28 is passed through one of the bores '01passages 6, its end 29,.will engage the curved wallin the groove of theplug and be thereby directed toward theother'jbore or passage 6,,sothatby continued pressure, the wirecan be caused to pass through theotherbore or passage 6, as clearly illustratedin Figure 16.

i In the construction shown in Figures 5 and 6, the bore 310corresponding to the bore 12 in Figure 3, is made somewhat tapering andthreaded to receive an exteriorly threaded plug 32 having a wrenchengaging portion 33. In Figure 7, the bolt is provided at one end withan angular wrench receiving socket 34 and inwardly of this socket, thebore portion 12 is located to receive the plug 13 which is welded inplace as indicated at 14.

In Figure 8, the plug member 35 is shown integral with a cap or closure36, the flange of which is threaded interiorly to'engage the exteriorthread at one end of the bolt.

In Figure 9, a cap or closure 37 is shown to screw onto one end of thebolt and this cap or closure is made with an enlargement 38 having aninterior curved recess 39 corresponding in function to the curved grooveor recess 15 of the plug 13. In this form, the part which directs thetesting medium from one passage to the other in the bolt, is'formed asan integral part with a cap or closure for the bolt.

" In Figure 10, I have shown a portion of a bolt 40 of the flexiblestaybolt type having a rounded head which, as shown in Figure 10, ismade in two parts welded together as at 4243 and in the outer portion ofsaid rounded head, a curved groove 44 is formed to connect the passages6 in the bolt. In Figure 11,acap or closure 45 is screwed onto the endof the bolt and provided with a curved groove or recess 46 whichfunctions the same as the groove or recess 15 in- Figure 3 and thegroove or recess 39 in Figure 9, or the groove or recess 44 in Figure10.

In Figure 12 is shown one end portion of a rigid bolt having a recess 47corresponding to the bore 12, Figure 3, and in this recess, the plug 48is located and welded as at 49,said plug having a curved groove 50, onewall of which is formed by pro ec tion 51 integral with the boltbet-ween the passages 6 therein. The construction shown in Figure 12 issimilar to that shown n Figure 3, but in Figure 12, the section is takenat right angles to the section shown in Figure 3.

InFigure 13 is shown a bolt of the flexible type having a rounded head52 provided with a threaded socket 53 to receive a thread ed plug54,-the latter having a curved groove 55 corresponding in function tothe groove 15 in Figure 3. The plug 54 may be provided with a wrenchengaging head 56.

In the construction shown in Figure 14, a tapering sleeve 57 is shown, aportion of the interior of this sleeve being threaded to screw onto thebolt 7. Within the projecting unthreaded portion of this sleeve, amember 58 is inserted and provided with a curved groove 59 which servesto connect the passages 6 in the bolt. This member 58 serves thefunction of the plugs shown in other views and also as a closure for theend of the bolt. The plug or member 58 may be secured within the sleeve57 by a weld 60 or said plug or member may be made integral with thesleeve.

In the construction shown in Figure 15, a sleeve 61 is employed andthreaded exteriorly to engage a similarly threaded Wall in the openingof a boiler sheet. The sleeve 61 is also threaded interiorly as at 62 toscrew onto the end of the staybolt and it is also screw threadedinteriorly as at 63 for the accommodation of an exteriorly threaded plugor closure 64 having wrench engaging head 65 located in the otherportion of the sleeve. The inner end of the plug or 010- sure 64 isprovided with a curved groove-or recess 66 which serves to connect thebores or passages 6 in the bolt.

In the construction shown in Figure 16, one end portion of the bolt ismade flaring as at 6'? and this flaring portion is threaded externallyas at 68 to screw through the boiler sheet 8 and it is also threadedinteriorly as at 69 to receive the exteriorly threaded portion of a plugor closure 70, the inner end of which latter is provided with groove 71to connect the passages 6 in the The bolt 72 shown in Figure 19 is ofthe flexible staybolt type having a rounded head 73 and having a borewhich is divided by a partition such as shown at 4, Figure 18 or 3,Figure 17, to provide two passages which are connected in the headed endof the bolt by the end portion of the large bore 2 which ierlminateswithin said headed portion of the Figure 20 also shows a staybolt of theflexible staybolt type having a plug 7 4 welded in an opening in thehead 75 of the bolt and also provided with a plug 76 threaded into theother end of the bolt. The bores 6 in the bolt terminate short distancesfrom the respective plugs 74 and 7 6 so that spaces 77 and 78 areprovided which serve as connecting means for the two bores or passages.When the bolt is thus constructed,the testing'medium may consist of awire 79 having its ends connected together so that it may be movedthrough the respective passages and the spaces 77 and 78 connecting saidpassages. When this bolt is to be inspected, the operator or inspectormay remove the plug 76 and thus gain access to the testing wire 79. v

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is:

1. A staybolt having a plurality of longitudinal passages side by sideand in com munication at their inner ends and receiving testing means.

2. A staybolt having a plurality of longit-udinal side by side passagesfor testing means, said passages extending into but not through one ofthe end portions of the bolt and in communication at the latter endportion of the bolts.

3. A staybolt having a head at one end and having a plurality oflongitudinal side by side passages for testing means extending into butnot through the head of the bolt and in communication Within the head.

l. A staybolt having a head, the latter consisting of a plurality ofmembers secured together, said bolt having a plurality of iongitudinalpassages for testing means and extending through at least one of thesecured members of the head, but terminating and being connected withinsaid head.

5. A staybolt formed from a single blank having a plurality oflongitudinal side by side passages for a testing medium, said passagesbeing connected at one end.

6. A staybolt for boilers having a plurality of connected longitudinalside byside passages for a testing medium.

7. A staybolt having a plurality of passages open at one end andconnected adjacent the other end of the bolt.

8. A staybolt having a plurality of passages accessible at one end ofthe bolt, and

deflecting means connecting said passages adjacent the other end of thebolt.

9. A staybolt having a lurality of passages, and a closure for saipassages at one end of the bolt, said closure having a passageconnecting the passages in the bolt.

10. A staybolt provided with a plurality of longitudinal passages, and aclosure adjacent one end of the bolt and having a curved grooveconnecting said passages.

11. A staybolt having a bore, means dividing said bore to provide twolongitudinal passages, and a closure adjacent one end of the bolt andhaving a passage establishing communication between said longitudinalpassages.

12. A staybolt having two longitudinal passages, and a plug having agroove connecting said passages.

13. A staybolt having, two longitudinal passages, and a plug in one endportion of the bolt and having a groove with a curved base, the groovedplug serving to connect said passages and to provide deflecting meansfor a testing medium from one passage to the other.

In testimony whereof, I have signed this specification.

ETHAN I. DODDS.

